Air-pump.



No. 888,762. PATENTED MAY 26, 1908. S E. SPENCER.

AIR PUIVIP AEPLIGATION FILED MAR.1.1907.

Witnesses. lnvenmr.

tatinfr SAMUEL ENIS SPENCER, OF SPRINGVILLE, NEW YORK.

Specification of Letters Patent.

Patented May 26, 1908.

Application filed March 1, 1907. Serial No. 360,070.

To all whom it may concern:

Be it known that I, SAMUEL ENrs SPENCER, a citizen of the United States, residing at Springville, in the county of AErie and State of New York, have invented a certain new and useful Improved Air-Pump, of which the following is a specification.

This invention relates to lan improved air pump and the object'of the invention is to produce a comparatively light but exceedingly strong portable pump for inilating automobile tires or the like,'which is mechanically driven and which can be instantly connected to or disconnected from a rotating art on the automobile or the like, such as, ror instance, the crank shaft of the engine being manually held in connection with the ropart through hand grasping parts or handles on the air ump.

The invention a so relates to certain details of construction, all of which will be fully and clearly hereinafter described and claimed, reference being had. to the accompanying drawings in which,

Figure 1 is a plan view of the improved air pump showing itioperativ'ely connected to a rotating shaft, a portion of which Ais shown in tion through the improved air pump. Fig. 3 is an enlarged detached inside view of one of the cylinder heads with the inlet valveI removed. Fig. 4 is an enlarged detached outside view of one of the cylinder heads with the inlet valve removed and showing a section through the outlet valve on line a (L, Fig. 1. Fig. 5 is an enlarged central longitudinal section through one of the cylinderheads and a fragment of the cylinder showing the inlet valve. Fig. 6 is an enlarged fragmentary section through the improved )ump on line l) b, F i0. 1 showing the outlet v. Ve. Fig. 7 is an en arged detached central section through one ofthe Vpistons showing the manner of securing it to the piston'rod. Fig. Sis a detached face view of the piston locking disk. Fig. 9 is an enlarged detached endview of one of the istons, showing a transverse section throng the piston rod. Fior. 10 is a detached view of one of the inlet valves.

In referring to the drawings for the details of construction, like numerals designate like parts.

The im roved air um is ofthe single actb ing type and primari y consists of a plurality of cylinders, the pistons of which are `con- -Fig. 2 1s a central longitudinal secnected to. each other so as to operate in unison, and are iven a reciprocating movement by means o a connecting rod and crank on a rotating shaft and it is adapted to be held in temporary engagement with the-rotary shaft ofan engine by hand graspinor handles.

In the preferred adaptatlon of the invention as illustrated in the accompanying drawings, the .cylinders 1 and 2, are formed in opposed relation in a casing 3,Y the outer ends of the cylin der'walls 4 and 5, terminating in annular anges 6 and 7. The portion ofthe casing 3, between the cylinders ispreferably made slightly larger in diameter than ghe cylinders, as will be seen by referring to Cylinder heads 8 and 9, are fastened by bolts 10, to the flanges 6 and 7, at the louter end/s of the cylinders, a packing 11, of leather or (Tther suitable `material being interposed therebetween to render the joint air tight, see Figs. 5 and 6.

The pistons, two in number, are constructed substantially as shown in Figs. 2, 7, S and 9, and are adjustably fastened to the piston rod, one at each end thereof.'

Each piston consists of a fianged metal disk 12, of approximately the same diameter as the cylinder in which it operates, a packing ring 13, of leather or similar material which fits snugly within the cylinder, and a.

looking disk 14, for fastening the packing ring to the flanged disk and also immovably locking the piston to the piston rod 15.

The flanged disk 12, has an inwardly extending hub 16, which is interiorly screw threaded and into which the end of the piston rod 15, screws.

The uacking ring 13, is dished as shown in Fig. 7 eing provided with a com aratively wide annular flange 17, and is he d against the flat outer face of the flan ed disk 12, by the locking disk 14. This dis 14, is of suilicient diameter so as to fit snugly within the flange 17, of the packing ring,- and has a. square central opening 18, in which the square extremity 19, of the piston rod 15, fits. The locking disk 14, is secured to the flanged disk 12, by two counter sunk screws 20,'by which it is drawn u i to tightly pinch plie packing ring 13, t erebetween, see

fig. 7.

It will readily be seenlthat the square extremity of the piston rod 15, fitting into the square opening in the locking disk absolutely on the casing 3,

the .flanged disk screwed back or forth until the desired position is reached, when the locking disk is replaced.

'liiepistons are given a reciproca ting Inovement in the cylinders by means of a rotating sha-ft 2l, journaled in a lateral extension 22, Y between the cylinders land 2, and which is connected to the piston rod l5, by a crank 2?, and connect-ing rod 2l. The piston rod l5, is bent as shown in Figs. l and. 2. to provide space tor the crank and connecting rod, and is enlarged as vshown at 25, in and 7 nea-r one end to which enlargement one end of the connecting rod 24, is pivfjted by a pm A collar 27, is secured by a pin to the projecting portion of the shaft 2l, and prevents any longitudinal movement of the shait in its bearing, see JFigs. l and 2.

.The casing 3, is cut away in part as shown at 2S, to permit the rotation of the crank 23, and also to lighten the construction.

Each oi the cylinder heads S and. 9, is irovided with an inlet valve and an outlet va ve, the inlet valve -being` partially located within a central tubular extension 29, on the outside ot the cylinder head, and the outlet valve being located in a vertical enlargement 292K A longitudinal central opening 3U, is

-termed in the cylinder head around which are grouped a 'ilurality' of inlet ports 3l. These ports 3i., lead into the cylinders from the interior of the tubular extension 28. sin annular i'lange 32, is formed on the inner face ci the cylinder head, being smaller in diameter than the cylinder into which it projects, but larger than the group of inlet ports 3l, sec fr ring 33, of leather or other suitable material .tits snugly against the cylinder head withinthe flange 32, and surrounds the inlet ports 31. This ring 38, forms valve seat for a disk valve 34, thc stem S5, ot which projects through the centrai opening 30, into the tubular extension The projecting portion ol the valve stern 35, is encircled by a coil spring 3G, which is held in place by a washer B7, see Fig. 5. This constitutes the inlet valve.

The outlet valve is of the ball type and is lillustratedmin Figs. l. and G.

he enlargement 29, has a deepl vertical chamber which communicates with the cylinder by means ol a passage or outlet port 39. A ring of leather or similar materia '10, is placed in'thc bottom of the chamber 3S, and has a central openingl which registers with the outlet port 39, constitutes alvalvc seat for a. ball valve 4l whichV is adapted to .seat infandbnormally close the centri opening, see Figs. e and o.

i the tire valve in the usual manner.

This leather ring ball.

the upward .movement of the The two valve chambers 38, are connected by a longitudinal tube 45, which has its ends seated in the flanges' ti and 7. A passage 16, in each cylinder headregisters with the tube and connects the tube with the valve chamber in the manner shown in Fig. 6. Tt will be noticed by referring to said ligure that the extremity ol`v the tube 45, projects beyond the i'lange'so that it embeds itsel in the packing 1l, and prevents any' leakage oil air at this joint. The upper end of thel valve chamber 38,' is closed by a screw plug 47, sec Figs. l and 6.

As the valves on both cylinders head are similar, but one set has been described, like reference numerals being-used to indicate corresponding or like parts on both sets.

A nipple 48, screws transversely into one of the. enlargements 29, and communicates with the chamber 38. A rubber tube 4S), may be secured to this nipple by a coupling 50, to convey the compressed air to any desired place, such as, for instance, the pneumatic tire of an automobile.

A pressure gage 51, oi any well known kind may be attached to thc pump by screwing its stem into the vertical opening 522, in one of the screw plugs 47, to indicate the pressure ot the compressed air.

The t bular extensions 29, on. the cylinder heads S and 9, are interiorly screw threaded and a pair of hollow handles 53, open at the ends, are screwed into the extensions as shown in. Figs. l and 2. These handles l'orm convenient means lor holding thc pump and being hollow also serve as inlet passages to. conduct air Lo-thc inlet valve cl'iambers.

The outer extremity oi thc shalt 2] is made square in cross section and is adapted to be inserted. in a square opening 5ft, in the end of a rotating clement, such as the crank shal't 55, of an engine. By this means the shalt ol" the pump is connected directly and 'posi tively to the engine shalt and revolves in unison with it.

The operation ol thc improved air pump is follows :Wl'lihcn it is desired to inllate the tires oi an automobile or the like, the end oi' the rubber tube 49, is lirst coupled to The o ierator now grasps the pump by the handles 53, and inserts the square end ol' thc shalft Zigi-into the square opening 54, in the end oi' the engine shalt 55, in the manner shown in Fig. l. This causes the shaft 2l., to revolve and reciprocate the pistons in A transverse cylinders,

vhold the pump shaft in temp air as it is com- I the cylinders l and 2. The

is conveyed by pressed within the cylinders the outlet ports or passages 39, into the valve chambers 38. rlhe air-in one. of the i valve chambers 38, is conducted to the other ,f chamber which has the nipple 48, attached l thereto, by the tube 45, so that all the air l compressed within the cylinders centers in f that chamber and is conveyed to the automobile tire through thc nipple 4S, and the rubber tube. When the pressure gage 5l, registers the desired pressure within the tire, the operator withdraws the shaft 2'1, from l the rotating engine shaft which stops ythe pump. l rlhis `improved pump is entirely separate and distinct from the automobile and is supported wholly by hand not being con-r nected or attached to any portion of the. automobile except the shaft of the engine and only to said shaft for the purpose of transmitting power.

I claim as my invention 1. The combination with an engine and its shaft, of a pump comprising a plurality of cylinders, pistons in said cylinders, a shaft having crank connection with said pistons, means for temporarily connecting said shaft to the engine shaft and handles attached to the pump and adapted to be gripped by the o )era-tor to hold the pump shaft in temporarily operative engagement with the engine shaft.

2, The combination with an engine and its shaft, of a pump eomprisin a plurality of pistons in said cy inders, a shaft having crank connection with said. pistons, means for temporarily connecting said shaf-t to the engine shaft and means attached to the pump and adapted to be grasped by the operator to Wholly support the pump and orarily operative engagement with the engine shaft:

3. The combination with an engine and its shaft, of an air pump adapted to be temporarily attached to said engine to be driven therefrom comprising a hollow casing having a cylinder at each end, a cylinder head attached to the outer end of each cylinder, an outlet valve and inlet valve in each cylinder head, a tube connecting the outlet valves, a connection extending from said tube to the part requiring a compressed medium, pistons in said cylinders, a shaft, a crank extending from said shaft, a connection between said crank and one of the pistons and oppositely extending handles on the cylinder heads adapted to be grasped by the operator to wholly support and hold the air pump in position tobe driven from the engine with the shaft of the air pump connected to the engine shaft., substantially as set forth.

4. The combination with an engine and its shaft, of a pump having a cylinder and a pis` ton in said cylinder, a shaft having crank connection with said piston, means for temporarily connecting said shaft to the engine shaft and means attached to the pump and adapted to be grasped by the operator to wholl support the pump and hold the pump shalt in temporarily active engagement with the engine shaft.

5. A device of the class described comprising a hollow casing having a cylinder at each end, a cylinder head attached to the outer end of each cylinder and having a tubular eX- tension formln both an air inlet and a handle adapted to e grasped by the hands of the operator to hold the t driven, pistons in said cylinders, a shaft, a crank extending from said shaft and a connection between said crank and one of the pistons. f

SAMUEL ENis SPENCER. i .VVitnesses:

L. M. SANGsTER, GEORGE A. NEUBAUER.

evice in position to be l 

